Circular stapler for hemorrhoid operations

ABSTRACT

A circular stapler for performing hemorrhoidal operations is disclosed. The circular stapler includes an anvil, a stapler head and a shaft which movably supports the anvil in relation to the stapler head between open and closed positions. The stapler includes at least one displacing member, each of which is arbitrarily and/or independently displaceable along the shaft. Each of the at least one displacing members has a first end configured to engage a pursestring suture and a second end which extends through the body, e.g., the neck of the stapler. The displacing member is arbitrarily displaceable along the shaft. In one embodiment, two independently displaceable displacing members are provided. In another embodiment, the at least one displacing member is at least partially embedded in the shaft.

This application claims priority from PCT application Ser. No.PCT/US04/28928, filed Sep. 1, 2004 which is incorporated herein in itsentirety by reference.

BACKGROUND

1. Technical Field

The present disclosure relates to a circular stapler for hemorrhoidoperations. More specifically, the present disclosure relates to amodified circular stapler for simplifying in hemorrhoidal operations theprocess of pulling prolapsed hemorrhoidal and/or mucosal tissues intothe stapling head.

2. Background of Related Art

A circular stapler (HCS33) has recently been made public which issuitable for hemorrhoid operations and shows extraordinarily goodresults. During its use, however, there arise several technicaldifficulties, as for example: the difficulty of pulling the suture orthread through the lateral holes of the stapler head, or the repeatedknotting of the ends of the suture or thread. As a result, theinstrument after having already been set, repeatedly moves out of placeor temporarily releases.

Accordingly, there has arisen a need for a modified circular staplerwhich eliminates the above-mentioned technical difficulties which occurduring hemorrhoidal operations.

SUMMARY

In accordance with the present disclosure and on the basis of theabove-mentioned recognition, a modified circular stapler is disclosedwhich can include a ring, a displacing tube or one or more displacingrods with hooks or holes that can be independently or arbitrarily movedalong a shaft of the stapler. The shaft of the stapler connects theanvil to the stapler head and may include a pin attached to the anviland a sheath movably attached to the stapler head.

In accordance with a first embodiment of the presently disclosedcircular stapler, a ring which has an arbitrarily fashioned flange and aconnectable rim is attached to the pin of the anvil. The ring is freelymovable along the shaft of the pin and sheath. A displacing tubesurrounds the sheath and has at its upper end a hangable hook that canbe connected to the attaching rim and at its lower end a displacingbutton. Through the body, e.g., the head, neck or handle, of thestapler, there is a slot which is arranged longitudinally and in whichthe displacing button moves. As another possible solution, thedisplacing tube may be replaced by a displacing rod that is providedwith a hangable hook that can be connected to the connecting rim.

In accordance with a second embodiment of the presently disclosedcircular stapler, the pin and sheath are fixed by an insolubleconnection and, thus, define an integral shaft. The displacing tubeforms a rigid unit with the ring and is freely movable along the shaft.A displacing button is connected to the lower end of the displacingtube. On the neck of the stapler, there is a slot which runslongitudinally and has arranged at its upper end a lateral slot portionwhich locks the displacing button in place. According to anotherpossible solution, the displacing tube may be replaced by a displacingrod.

In accordance with a third embodiment of the presently disclosedcircular stapler, a thread or wire with a circlet is connected to thering that is freely movable along the shaft. The neck of the staplercontains a hole through which the thread or wire exits the neck.

In accordance with a fourth embodiment of the presently disclosedcircular stapler, a displacing rod is or a plurality of displacing rodsare provided. Each displacing rod includes a hole or a hook at an upperend thereof. On the neck of the stapler, there is a slot that runslongitudinally and can include a lateral component which locks thedisplacing button in place. As a possible advantageous solution, the oneor more displacing rods may be at least partially embedded into theunitarily cast shaft of the pin and sheath.

BRIEF DESCRIPTION OF THE DRAWINGS

Various embodiments of the presently disclosed circular stapler forhemorrhoid operations are disclosed herein with reference to thedrawings, wherein:

FIG. 1 is a side elevational view with parts separated of the distalportion of one embodiment of the presently disclosed circular stapler;

FIG. 1A is a side elevational view of a displacing rod having aconnecting component and button of the circular stapler shown in FIG. 1;

FIG. 2 is a side elevational view of the distal portion of a secondembodiment of the presently disclosed circular stapler;

FIG. 2A is a side elevational view of a displacing rod having a ring andbutton of the circular stapler shown in FIG. 2;

FIG. 3 is a side elevational, partial cross-sectional view with partsseparated of the distal portion of a third embodiment of the presentlydisclosed circular stapler;

FIG. 4 is a side, elevational view of the distal portion of a fourthembodiment of the presently disclosed circular stapler; and

FIG. 4A is a cross-sectional view as would be seen through the shaftwith displacing rods slidably mounted or embedded therein according toan alternate embodiment of the circular stapler shown in FIG. 4.

FIG. 4B is a cross-sectional view as would be seen through the shaftwith displacing rods slidably mounted or embedded therein according toanother alternate embodiment of the circular stapler shown in FIG. 4.

DETAILED DESCRIPTION OF EMBODIMENTS

Embodiments of the presently disclosed circular stapler will now bedescribed in detail with reference to the drawings in which likereference numerals designate identical or corresponding elements in eachof the several views.

Referring to FIG. 1, the presently disclosed circular stapler includesan anvil 1 and a stapling or stapler head 10. Anvil 1 is movablysupported in relation to stapler head 10 in a known manner between openand closed positions. Stapler head 10 supports a plurality of staples(not shown). The stapler is operable in a known manner to eject thestaples from stapler head 10 into or against anvil 1. The stapler alsoincludes a knife (not shown) which is movable in a known manner fromwithin stapler head 10 towards anvil 1 to cut tissue positioned betweenanvil 1 and stapler head 10.

As can be seen in FIG. 1, a ring 3 can be slid freely along thedisassemblable shaft that includes a pin 2 of anvil 1 and a sheath 6 ofstapler head 10. The disassemblable shaft connects anvil 1 to thestapler. At the upper edge of ring 3 there is an arbitrarily arrangeableflange 4 which is used to hang up or engage a purse-string suture. At alower edge of ring 3 there can be a connectable rim 5 which makes itpossible to connect ring 3 to a displacing member, e.g., a connectabledisplacing tube 7 or a displacing rod 13. Displacing tube 7 is situatedoutside sheath 6. At the upper end of displacing tube 7 or thedisplacing rod 13, there is a hangable hook 8. At a lower end ofdisplacing tube 7 or displacing rod 13, there is a displacing button 9.On neck 11 of the stapler there is a slot 12 which is longitudinallyarranged. FIG. 1A shows displacing rod 13 having displacing button 9 ona proximal end and a connecting component in the form of a hangable hook8 on a distal end.

As can be seen in FIG. 2, the pin and the sheath are integrally formedas a shaft 16 which is not disassemblable. Shaft 16 is surrounded by anindependent displacing tube 15, at whose lower end is displacing button9 and at whose upper end is flange 4. The displacing tube or displacingrod forms a rigid unit with the ring and surrounds shaft 16. The upperend of longitudinal slot 12 is arranged on neck 11 of the stapler andincludes an angled continuation which forms a locking slot 17 forreceiving displacing button 9. FIG. 2A shows displacing rod 18, whichforms a rigid unit with ring 3.

As can be seen in FIG. 3, a displacing member including a thread or wire19 at its proximal end having a circlet 20 can be connected to ring 3,which is freely movable along the disassemblable shaft defined by pin 2and sheath 6. On neck 11 of the stapler, there is arranged through ahole 21 through which thread or wire 19 extends from neck 11 and ismovable.

As can be seen in FIG. 4, the pin and the sheath are formed as anintegral shaft 16 which is not disassemblable. Ring 3 is replaced by oneor more or motive sticks or displacing rods 23, each of which isprovided with a hook 22 or advantageously with a hole 24. At a lower endof each displacing rod 23, there is a displacing button 9. Displacingrod 23 runs beside shaft 16 or, alternatively, is slidably embedded intoshaft 16 (FIG. 4A). Longitudinal slot 12 is arranged on neck 11 of thestapler and has at its upper end a component 14 which is rotatable aboutneck 11 to lock displacing button 9 in a position in relation to neck11. Displacing button 9, together with displacing rod 23, can bearbitrarily moved in slot 12.

The operation of the mechanism in accordance with the invention is thefollowing:

After placing an inner purse-string suture in the rectum, anvil 1 isintroduced into the rectum. Anvil 1 can be dish-shaped. Ring 3 slidesfreely on pin 2 of anvil 1. The purse-string suture is fixed with a knotto or on the body of ring 3 under arbitrarily arrangeable flange 4.Next, pin 2 is connected to sheath 6 and displacing tube 7 is connectedto connecting rim 5 using the hangable hooks 8. Alternately, displacingtube 7 may be replaced by the displacing rod 13. Prior to operation,displacing button 9 is positioned at the upper end of slot 12.Displacing button 9 can now be pulled downward to pull the hemorrhoidaltissues attached by the purse-string suture to ring 3 downward, into theinterior of stapling head 10. Next, the stapler can be closed andactuated in a manner which in and of itself is well known.

According to another possible solution, thread or wire 19 having a ringor circlet 20 is connected to ring 3 (See FIG. 3). Thread 19 is pulledthrough hole 21 arranged on neck 11 of the stapler, to pull down ring 3together with the hemorrhoidal tissues attached thereto via thepurse-string suture.

Insofar as the stapler has unified shaft 16 for the pin and sheath, anindependent displacing tube 15, or a displacing rod 18 which forms arigid unit with ring 3 can be used. Displacing button 9 can be placedinto locking slot 17 or locked by means of locking component 14 (whichmay advantageously be a rotatable ring), while the head 10 of thestapler is pushed or inserted into the rectum and the knot of the sutureis positioned under flange 4 of ring 3. After this, displacing button 9is moved into longitudinal slot 12, or locking component 14 is rotatedto unlock displacing button 9. Displacing button 9 can now be pulleddownward. The remainder of the procedure is similar to what has beendescribed above. As a possible variation, instead of using ring 3, adisplacing rod 23 which at its end is provided advantageously with ahole 24 and/or with a hook 22. Its use is similar to what has beendescribed above, i.e., the purse-string suture is fixed through hole 24or under the hook 22. Displacing rod 23 is positioned along or besideshaft 16. Alternately, displacing rod 23 may be embedded into shaft 16(FIG. 4A).

Insofar as the stapler has a plurality of displacing rods 23, e.g., twosuch rods, two half purse-string sutures independent of each other canbe attached to the ends of the two separate displacing rods 23, each ofwhich is provided with a hole 24 or a hook 22. As such, there isobtained the possibility of pulling displacing rods 23 to differentdegrees to pull the prolapsed hemorrhoidal cushion portions that havebecome loosened to different degrees into stapler head 10 and therebyfacilitate and obtain differentiated excision of the differenthemorrhoidal cushioned portions. The displacing rods 23 can be pulleddifferent distances to provide an excision which is proportional to theloosening of the respective hemorrhoidal tissue portions.

An important advantage of the solutions in accordance with an embodimentor embodiments of the invention is that in the event of hemorrhoidaloperations using a stapler of the invention, it ensures that theoperating technology or technique is simplified, that the instrument'smoving out of place or releasing is eliminated, and that the excisionwill be proportional to the loosening of the respective hemorrhoidaltissues.

1. A circular stapler for performing hemorrhoidal operations, thestapler comprising: an anvil and a stapler head, the anvil beingsupported on a shaft and being movable in relation to the stapler headbetween open and closed positions, the stapler including a ring which isarbitrarily displaceable along the shaft, and a displacing member havinga first end including a connecting component connected to the ring and asecond end including a displacing button extending through a body of thestapler, the displacing member being movable to arbitrarily displace thering along the shaft.
 2. A circular stapler as recited in claim 1,wherein the displacing member includes a displacing rod.
 3. A circularstapler as recited in claim 1, wherein the displacing member includes adisplacing tube.
 4. A circular stapler as recited in claim 1, whereinthe shaft includes a pin which is attached to the anvil and a sheathwhich is movably supported on the stapler, the pin beingdissassembleable from the sheath.
 5. A circular stapler as recited inclaim 1, wherein the ring includes a flange and a connecting rim.
 6. Acircular stapler as recited in claim 1, wherein the body of the staplerincludes a longitudinal slot (12), and the second end of the displacingmember extends through the longitudinal slot such that the longitudinalslot guides movement of the displacing button (9).
 7. A circular staplerfor performing hemorrhoidal operations, the stapler comprising: an anviland a stapler head, the anvil being supported on a shaft and beingmovable in relation to the stapler head (10) between open and closedpositions, the stapler including a ring which is arbitrarilydisplaceable along the shaft, and a displacing member having a first endconnected to the ring and a second end extending through a body of thestapler, the displacing member being movable to arbitrarily displace thering along the shaft, wherein the body of the stapler includes alongitudinal slot, the second end of the displacing member extendingthrough the longitudinal slot such that the longitudinal slot guidesmovement of the displacing button, and wherein the stapler includes alocking slot for locking the displacing member in a fixed position.
 8. Acircular stapler as recited in claim 7, wherein the displacing memberincludes a displacing rod.
 9. A circular stapler as recited in claim 7,wherein the displacing member includes a displacing tube.
 10. A circularstapler as recited in claim 7, wherein the displacing member is providedwith a displacing button.
 11. A circular stapler as recited in claim 7,wherein the displacing member forms a rigid unit with the ring.
 12. Acircular stapler for performing hemorrhoidal operations, the staplercomprising: an anvil, a stapler head and a body that communicates withthe stapler head, the anvil being supported on a shaft and being movablein relation to the stapler head between open and closed positions,wherein the stapler includes a ring which is arbitrarily displaceablealong the shaft, and a displacing member including a thread or wirehaving a first end secured to the ring and a second end extendingthrough the body of the stapler, the displacing member being movable toarbitrarily displace the ring along the shaft.
 13. A circular stapler asrecited in claim 12, wherein the shaft includes a pin which is attachedto the anvil and a sheath which is movably supported on the stapler, thepin being dissassembleable from the sheath.
 14. A circular stapler asrecited in claim 12, wherein the ring includes a flange and a connectingrim.
 15. A circular stapler as recited in claim 12, wherein the body ofthe stapler includes a hole and the displacing member extends throughthe hole.
 16. A circular stapler for performing hemorrhoidal operations,the stapler comprising: an anvil and a stapler head, the anvil beingsupported on a shaft and being movable in relation to the stapler headbetween open and closed positions, wherein the stapler includes at leastone displacing rod, each of the at least one displacing rods having afirst end provided with a hole or hook configured to engage a suture anda second end extending through a body of the stapler.
 17. A circularstapler as recited in claim 16, wherein the second end of each of thedisplacing rods is provided with a displacing button.
 18. A circularstapler as recited in claim 16, wherein the body of the stapler includesat least one longitudinal slot, the second end of each of the at leastone displacing rod extending through a respective one of the at leastone longitudinal slot such that the respective one of the at least onelongitudinal slot guides movement of the displacing button.
 19. Acircular stapler as recited in claim 16, wherein the stapler includes arotatable locking component for locking the displacing button in a fixedposition.
 20. A circular stapler according to claim 16, wherein the atleast one displacing rod includes two displacing rods, each of thedisplacing rods being independently and arbitrarily moveable along theshaft.
 21. A circular stapler as recited in claim 16, wherein one ormore of the displacing rods is at least partially embedded in the shaft.